Nitrogen oxides	NO2,NO(Separete quantification)	NO.10

Performance

Name of Gas	Nitrogen Dioxide (NO2)	Nitric oxide (NO)
Measuring Range	2.5 to 200 ppm	2.5 to 5 ppm	5 to 200 ppm
Pump Strokes	1	2	1
Correction Factor	1	1/2	1
Sampling Time	1 minute per pump stroke
Detecting Limit	0.5 ppm (n=1)	1 ppm (n=2)
Color Change	White Yellowish orange
Reaction Formula	NO2 tube: Nitrogen dioxide reacts with o-tolidine to produce yellowish orange stain. NO tube: Nitric oxide reacts with acid to produce acid gas and acid gas react with o-tolidine to produce yellowish orange stain.
Coefficient of Variation	NO2 tube: 10% (for 2.5 to 20 ppm), 5% (for 20 to 200 ppm) NO tube:10% (for 5 to 20 ppm), 5% (for 20 to 200 ppm)
Shelf Life	3 Years
Corrections for temperature & humidity	NO2 tube:Unnecessary NO tube:Temperature correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences

(NOTE)

Calibration gas generation

Permeation tube method